Facing error in running my extension in Joomla 4

[snitish576]

Hello Team,

I have a requirement to run three extensions in my Joomla 4 project. Out of these three extensions two are working fine but whenever I enable the third extension, it gives my the error 'Call to a member function getWebAssetManager() on null'.
All these three extensions are working fine in Joomla 3.

It seems like there is some conflict in the below line whenever I enable my extension:-

$wa = $this->getWebAssetManager();

This line of code is written in around 300+ files.

Any help would be appreciated
Thanks

[Per Yngve Berg]

Mod. Note: Relocated the topic from J5 Forum to 4.x Coding.

[robbiej]

It looks like $this is set to null. It could be the case that

- you're not inside a PHP class

- you're in a static function of a class

- you've set $this to null at some point

We'd need a bit more context to determine what the source of the problem is.