Call to a member function className() on null

[videokid]

Fatal Error: Uncaught Error: Call to a member function className() on
null in wire/modules/Fieldtype/FieldtypeTextareaHelper.php:41
#0 wire/modules/Fieldtype/FieldtypeTextarea.module (338): FieldtypeTextareaHelper->getConfigInputfields(Object(Field),Object(InputfieldWrapper))
#1 wire/core/Wire.php (417):FieldtypeTextarea->___getConfigInputfields(Object(Field))
#2 wire/core/WireHooks.php (951):Wire->_callMethod('___getConfigInp...', Array)
#3 wire/core/Wire.php (485):WireHooks->runHooks(Object(FieldtypeTextarea), 'getConfigInputf...', Array)
#4 wire/core/Field.php (1110): Wire->__call('getConfigInputf...', Array)
#5 wire/core/Wire.php (414): Field->___getConfigInputfields()
#6 /wire/core/Wir (line 41 of wire/modules/Fieldtype/FieldtypeTextareaHelper.php)

Hello everyone,

recently I stumbled on this error when trying to edit a textarea field... 
Running php 7.4 and PW 3.0.201.

Has anyone by chance encountered this problem?

Kind regards,
- Igor

[videokid]

Solved....

Seems an old module, which was not installed BTW, called TextareaCounter interfered... renaming or deleting will do the trick.
Just if someone runs into the same problem.

Kind regards,
- Igor

[2hoch11]

I have the same problem. I have a fresh install of the latest PW and cannot edit any Textarea fields…

"Call to a member function className() on null in wire/modules/Fieldtype/FieldtypeTextareaHelper.php:62"

…so what exactly ist the solution?

Did youinstall or delete the TextareaCounter module (witch i cannot find)?
I found this: 

 but this post is from 2014…

[2hoch11]

Somehow someway the Textarea error disappeared… I uninstalled the MultiplierInputfield (there was a message that said something like "there ist data in the database but no plugin data… do you want to delete the dabase entries?". I said yes.)

?‍♂️