0 - Class "JRequest" not found

[Worti2]

Hello Boris,
first of all many thanks for work the last years on multithumb.

I have this issue:
I installed a new joomla version 4.2.9 and I installed your BK-Multithumb in version 4.0.0.

When I start the website with my startsite and when I click to any other catergorie with a blog view I will get this error message:

0 - Class "JRequest" not found

But I am able to go to the article with images.

It would be glad, if you could help me.

Kind regards
Markus

[LogoJorge]

https://www.infyways.com/error-class-jrequest-not-found/

use copilot to replace 3 affected functions

[LogoJorge]

new error

500
behavior::modal not found.