Frontend Editor Error - Class HTMLOverride Not Found
J
Jiří Odstrčil
Hello JoomShaper Support,
I am the administrator of the website czechvanadium.com and I am experiencing a critical issue with SP Page Builder's frontend editor.
When I try to open the frontend editor, I get a 500 Internal Server Error with the following message:
Class "HelixUltimate\Framework\Platform\HTMLOverride" not found
Environment details:
- Domain: czechvanadium.com
- Joomla version: 4.4.14
- SP Page Builder version: 6.6.0
- Helix Ultimate version: 2.2.6
- PHP version: 8.0
What I have already tried:
- Reinstalled the Helix Ultimate plugin
- Verified that HTMLOverride.php exists in the correct location
- Verified that the class is registered in autoload_classmap.php
- Checked that the Helix Ultimate plugin is active and loads before SP PageBuilder (ID 10055 vs 10059)
- Cleared all Joomla cache
- Tried different PHP versions (8.0, 8.1, 8.2, 8.4)
The website frontend works correctly, only the SP Page Builder frontend editor is broken.
Could you please advise how to fix this issue?
Thank you in advance
12 Answers
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Atick Eashrak Shuvo
Accepted AnswerHi there!
Thank you for bringing this to our attention, and I sincerely apologize for the inconvenience caused.
To assist you more effectively, may I kindly request temporary administrative access to your site? This will allow me to thoroughly investigate and resolve the issue for you.
Before sharing the credentials, I strongly recommend taking a complete backup of your site to ensure all data remains secure.
Looking forward to your response.
Best regards
J
Jiří Odstrčil
Accepted AnswerHello,
Thank you for your willingness to help. You can find the login in the hidden section
Atick Eashrak Shuvo
Accepted AnswerPlease share the site url. your provided site link is not working
Atick Eashrak Shuvo
Accepted AnswerHi,
Sorry for the inconvenience.
I am unable to access your website from my end. It is possible that the site has country-based restrictions, firewall rules, IP blocking, or another security restriction in place that is preventing access from my location.
Could you please verify whether there are any geographic or IP-based restrictions enabled on the server? If possible, you may also provide temporary access or whitelist my IP so I can investigate the issue further.
Thank you for your cooperation.
J
Jiří Odstrčil
Accepted AnswerHi I checked with the hosting provider and there are no options to block/allow IP addresses. Only thing they said could be possible, is that the IP is on some blacklist
Can you try this link? It should check if my hosting provider sees you on some blacklist https://delist.webglobe.cz/
Thank you for your help
Atick Eashrak Shuvo
Accepted AnswerUnfrotunetly i still can not access your site. Can you please sahre a full backup of your site?
J
Jiří Odstrčil
Accepted AnswerHi, Did you get some message from the link?
Backup is in hidden content
Thank you in advance
J
Jiří Odstrčil
Accepted AnswerWe are currently using PHP 8.2 Other available options are 7.4, 8.0 and 8.4