Polaris next experience cannot working

[yasin1]

Hi,

We are using on-premise version and upgraded Sandiago Patch 10 hotfix 2b to Vancouver Patch 3. 

After than upgrade our instance is not working. HomePage comes blank and gives this error:

getAppliedTemplate.js:51 Uncaught TypeError: Cannot read properties of undefined (reading 'sysId')
at getAppliedTemplate.js:51:3
at Array.map (<anonymous>)
at QZ (getAppliedTemplate.js:49:2)
at getAppliedTemplate.js:57:3
(anonymous) @ getAppliedTemplate.js:51
QZ @ getAppliedTemplate.js:49
(anonymous) @ getAppliedTemplate.js:57
home_splash.do?sysparm_direct=true:51 Uncaught TypeError: Cannot read properties of undefined (reading 'templateLoader')
at home_splash.do?sysparm_direct=true:51:12

Do you have any idea for this problem?

Thanks,