Class "Mobile Detect" not found

wrong code from log this is the latest one:

[21-Sep-2024 19:23:32 UTC] Request URI: /market/index.php?main_page=down_for_maintenance, IP address: 40.77.167.235
--> PHP Fatal error: Uncaught Error: Class "Mobile_Detect" not found in /home/fantasies/public_html/market/includes/templates/responsive_classic/common/html_header.php:36
Stack trace:
#0 /market/index.php(42): require()
#1 {main}
  thrown in /market/includes/templates/responsive_classic/common/html_header.php on line 36.

how to fix please

heavensportal:

wrong code from log this is the latest one:

[21-Sep-2024 19:23:32 UTC] Request URI: /market/index.php?main_page=down_for_maintenance, IP address: 40.77.167.235
--> PHP Fatal error: Uncaught Error: Class "Mobile_Detect" not found in /home/fantasies/public_html/market/includes/templates/responsive_classic/common/html_header.php:36
Stack trace:
#0 /market/index.php(42): require()
#1 {main}
thrown in /market/includes/templates/responsive_classic/common/html_header.php on line 36.

> 
> how to fix please

That issue is not related to this module and seems surprising to occur considering responsive classic template is being used. 

Please either start a new issue outside of this module or search the Zen Cart forum a little more for an existing thread discussing that issue.

See bullet #2:
https://docs.zen-cart.com/user/upgrading/release_specific_upgrade_considerations/#zen-cart-20x

ok, I didn't get this error until I did ceon url mod and it all went well, although it did want me to add a file that was originally from 1.5.8, so when my page went into a blizzard I figured it was this mod since it isn't totally for my shop version yet. Which was all in my post prior to this one, but I guess the rest of it was fairly long and went to admins for approval????? if not get eaten by gremlins.

ok so then I need to find the file that it had me install and then the code to change to that on the page you linked.

yay doing the happy dance over here, thanks swguy

Glad you had success with this. When doing an upgrade, always be sure to check this page (Release Specific Upgrades Considerations)

https://docs.zen-cart.com/user/upgrading/release_specific_upgrade_considerations/

which gives tips for people with modified installations (i.e. pretty much everyone).