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Vishal Kumar 261Vishal Kumar 261 

I am getting below error while installing DreamHouse application in playground.

This app can't be installed.
There are problems that prevent this package from being installed.

EinsteinVisionController: Method does not exist or incorrect signature: void isRunningTest() from the type test Dependent class is invalid and needs recompilation: Class EinsteinVisionController : Method does not exist or incorrect signature: void isRunningTest() from the type test​​​​​​​

I have attached screenshots or the error message.
Best Answer chosen by Vishal Kumar 261
ANUTEJANUTEJ (Salesforce Developers) 
Hi Vishal,

Please try the same steps in another org and in case if the issue still persists then you can report the issue in the below links:

Also, make sure you have performed all the necessary steps.

https://trailhead.salesforce.com/en/help?support=home

https://trailhead.salesforce.com/help

So that our trailhead support engineers will look into it and get back to you.

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.

Regards,
Salesforce Support.

All Answers

ANUTEJANUTEJ (Salesforce Developers) 
Hi Vishal,

Please try the same steps in another org and in case if the issue still persists then you can report the issue in the below links:

Also, make sure you have performed all the necessary steps.

https://trailhead.salesforce.com/en/help?support=home

https://trailhead.salesforce.com/help

So that our trailhead support engineers will look into it and get back to you.

Kindly let me know if it helps you and close your query by marking it as solved so that it can help others in the future.

Regards,
Salesforce Support.
This was selected as the best answer
mukesh guptamukesh gupta
Hi Vishal,

I have tried to install my side that's working fine, i think you need to create new TrailHead Pleayground then try on this.

if you need any further assistace, please let me konow.

Please Mark it As Best Answer If it Helps

Regards
Mukesh