Hi there,
sorry to hear you’re experiencing this issue, I’m not able to reproduce it on my test website.
What you’re experiencing is the equivalent of a White Screen of Death (WSOD), it’s impossible to say what’s going wrong there without additional information. Please see our Guide to Debugging a White Screen.
Also, could you please provide us with your LifterLMS System Report?
Hi Rocco,
Below is my LifterLMS System Report. Thanks for your help and look forward to your response.
WordPress
-------------------------------------------
Home Url: https://---.com.au
Site Url: https://---.com.au
Login Url: https://---.com.au/wp-login.php
Version: 5.4
Debug Mode: No
Debug Log: No
Debug Display: Yes
Locale: en_US
Multisite: No
Page For Posts: Not Set
Page On Front: Home (#12) [https://---.com.au/]
Permalink Structure: /%postname%/
Show On Front: page
Wp Cron: Yes
Settings
-------------------------------------------
Version: 3.37.18
Db Version: 3.37.18
Course Catalog: COURSE LIBRARY (#422) [https://---.com.au/course-library/]
Membership Catalog: Membership Catalog (#359) [https://servoskills.com.au/memberships/]
Student Dashboard: STUDENT DASHBOARD (#361) [https://---.com.au/student-dashboard/]
Checkout Page: Purchase (#360) [https://---.com.au/purchase/]
Course Catalog Per Page: 9
Course Catalog Sorting: menu_order,ASC
Membership Catalog Per Page: 9
Membership Catalog Sorting: menu_order
Site Membership: Not Set
Courses Endpoint: my-courses
Edit Endpoint: edit-account
Lost Password Endpoint: lost-password
Vouchers Endpoint:
Autogenerate Username: yes
Password Strength Meter: no
Minimum Password Strength: strong
Terms Required: no
Terms Page: Not Set
Checkout Names: required
Checkout Address: hidden
Checkout Phone: hidden
Checkout Email Confirmation: yes
Open Registration: yes
Registration Names: required
Registration Address: hidden
Registration Phone: hidden
Registration Voucher: required
Registration Email Confirmation: yes
Account Names: required
Account Address: optional
Account Phone: optional
Account Email Confirmation: yes
Confirmation Endpoint: confirm-payment
Force Ssl Checkout: no
Country: AU
Currency: AUD
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Decimals: 2
Trim Zero Decimals: no
Recurring Payments: yes
Email From Address: [email protected]
Email From Name: ---
Email Footer Text:
Email Header Image:
Cert Bg Width: 800
Cert Bg Height: 616
Cert Legacy Compat: no
Gateways
-------------------------------------------
Manual: Disabled
Manual Logging:
Manual Order: 1
Server
-------------------------------------------
Mysql Version: 5.7.29
Php Curl: Yes
Php Default Timezone: UTC
Php Fsockopen: Yes
Php Max Input Vars: 1000
Php Max Upload Size: 8 MB
Php Memory Limit: 256M
Php Post Max Size: 8M
Php Soap: No
Php Suhosin: No
Php Time Limt: 30
Php Version: 7.2.27
Software: Apache
Wp Memory Limit: 40M
Browser
-------------------------------------------
HTTP USER AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36
Theme
-------------------------------------------
Name: Astra
Version: 2.4.2
Themeuri: https://wpastra.com/
Authoruri: https://wpastra.com/about/
Template:
Child Theme: No
Llms Support: Yes
Plugins
-------------------------------------------
Astra Hooks: 1.0.2
Astra Pro: 2.4.0
Classic Editor: 1.5
Contact Form 7: 5.1.7
Elementor: 2.9.7
Elementor - Header, Footer & Blocks: 1.4.1
LifterLMS: 3.37.18
Really Simple SSL: 3.3.1
Starter Templates: 2.2.1
Ultimate Addons for Gutenberg: 1.14.8
Under Construction: 3.75
WPForms Lite: 1.5.9.5
Yoast SEO: 13.5
Integrations
-------------------------------------------
BbPress: No
BuddyPress: No
Template Overrides
-------------------------------------------
Hi Dan,
thanks for the system info!
I’ve tried to reproduce the issue installing your plugins (except for the premium one Astra Pro) and theme on my test install, but I could download/save the certificate without any issues.
At this point you need to debug that error by enabling the debug logging:
Debugging in WordPress
Then when the issue reproduces you should be able to see one or more errors logged in your wp-content/debug.log that would help understanding what’s happening 🙂
Hi Rocco,
Thanks. So I have run the debug logging. This is what is shown from the log. I have also included below the extended error I am now getting when clicking on the ‘download’ button.
From the log:
[23-Apr-2020 00:36:23 UTC] PHP Fatal error: Uncaught Error: Call to undefined function mb_convert_encoding() in /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php:228
Stack trace:
#0 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(188): LLMS_Certificates->modify_dom(‘<!DOCTYPE html>…’)
#1 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(105): LLMS_Certificates->get_export_html(‘2060’)
#2 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(161): LLMS_Certificates->generate_export(‘/home/d08hqumg/…’, ‘2060’)
#3 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/controllers/class.llms.controller.certificates.php(149): LLMS_Certificates->get_export(‘2060’)
#4 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/controllers/class.llms.controller.certificates.php(111): LLMS_Controller_Certificates->download(‘2060’)
#5 /home/d08hqumg/public_html/wp-includes/cla in /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php on line 228
Error Message:
Fatal error: Uncaught Error: Call to undefined function mb_convert_encoding() in /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php:228 Stack trace: #0 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(188): LLMS_Certificates->modify_dom(‘<!DOCTYPE html>…’) #1 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(105): LLMS_Certificates->get_export_html(‘2064’) #2 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php(161): LLMS_Certificates->generate_export(‘/home/d08hqumg/…’, ‘2064’) #3 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/controllers/class.llms.controller.certificates.php(149): LLMS_Certificates->get_export(‘2064’) #4 /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/controllers/class.llms.controller.certificates.php(111): LLMS_Controller_Certificates->download(‘2064’) #5 /home/d08hqumg/public_html/wp-includes/cla in /home/d08hqumg/public_html/wp-content/plugins/lifterlms/includes/class.llms.certificates.php on line 228
Hi Dan,
thanks!
Fatal error: Uncaught Error: Call to undefined function mb_convert_encoding()
Looks like your PHP doesn’t include the multibyte string support.
Can you ask your hosting provider to enable it?
Hi Rocco,
So with the help of my hosting provider we enabled multibyte string. There was some other issues but they were able to fix form me. They referred to this website – https://github.com/gocodebox/lifterlms/issues/1118
Thanks so much for your help.
Dan.
This from the hosting provider (thought you may be interested incase someone else has the same issue):
In case you wanted to know the culprit:
$img->setAttribute( ‘src’, ‘data:’ . mime_content_type( $imgpath ) . ‘;base64,’ . $data );
The above code had to be removed from the plugin as the function was ‘Non-existent’ according to the above error. So removing it solved the issue.
Hi Dan,
good to hear!
They referred to this website – https://github.com/gocodebox/lifterlms/issues/1118
Yeah that’s the issue I opened after replying to you here 😀
This from the hosting provider (thought you may be interested incase someone else has the same issue):
In case you wanted to know the culprit:
$img->setAttribute( ‘src’, ‘data:’ . mime_content_type( $imgpath ) . ‘;base64,’ . $data );
The above code had to be removed from the plugin as the function was ‘Non-existent’ according to the above error. So removing it solved the issue.
Ok, so there’s an another error, once they enabled the multibyte string support, that popped out, and regards to the function mime_content_type as I understand.
The thing is that that function is a built-in PHP function, which I guess your hosting provider has disabled for some valid reason.
But what do they do instead of enabling it? They changed your plugin code?
If so, be aware that you’ll lose that change as soon as you update the plugin…
Hi @dantheman1981,
Since we haven’t heard back from you we are going to close this topic out.
If you still have further questions for us however, feel free to reply here or open a new thread!
Thanks and take care,
Hi Dan,
just wanted to inform you that LifterLMS v3.38.1 fixes the issue you encountered due to the PHP mime_content_type() function not available on your host.
Best
