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Vibha PatilVibha Patil 

Cat Rescue App: There was an unexpected error in your org which is preventing this assessment check from completing: System.StringException: Unrecognized base64 character: &

I was working on the Cat Rescue App and got this error: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.StringException: Unrecognized base64 character: &

I double checked and triple checked everything that I had done and tried it in different playgrounds and nothing worked. Does anyone have a solution to this?
SandhyaSandhya (Salesforce Developers) 
Hi,

Try to clear your browser cookies and cache and then check also let us know for which unit you are getting this error so that I can help you further.

Please mark it as solved if my reply was helpful, it will make it available
for others as a proper solution.

Best Regards,
​Sandhya
 
 
Vibha PatilVibha Patil
Hey,

So that didn't help... It was in the "Install Einstein Vision Apex Wrappers" Unit.

Sincerely,
Vibha Patil
Kathy RussellKathy Russell
I'm getting the same error message for the same TH unit. Can someone please Help!!!