When I try to duplicate my project I get this error
No such object: thunkable-x-production/users/5e9aab908747bb51e8699e36/projects/5ef8d05d65209bfa4bb4092a/assets/5ef96eba4652bab3b0591bcc
welcome to the community @adityapandey03f9wni6 
Can you send me your Project URL and I will try to fix this for you.
Thanks.