This is the issue from the Salesforce side. We have talked to Salesforce and they said we are resolving this issue for your application. Instead of updating our package from your org, please go to the AppExchange site (refer below link) after logout from your org and clearing the cache of your browser. Please follow the below steps:
Step 1: Go to Algoworks Case Management App on AppExchange https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3A00000ErAuaUAF in incognito/private mode.
Step 2: Click on “Get It Now” button
Step 3: Click on “Log In” button
Step 4: Fill credentials for production org in the fields and click on “Log In” button
Step 5: Click on “Install in Production” OR ”Install in Sandbox” button
Step 6: Check on agree checkbox and click on “Confirm and Install” button
Step 7: Fill credentials for production org in the fields and click on “Log In” button
Step 8: Select your options which you want to select for Users and Click “Install” button
Step 9: Let’s wait for install/upgrade new package to complete
Step 10: Now click on the “Done” button
These steps will upgrade your package into your production/Sandbox org.