Migrate selfhosted 1.5 version to cloud

Hello everyone, is there any chance of migrating an old 1.5 selfhosted instance to the cloud? I tried with migrate but always encounter the error:
"Couldnt load resources".
Any idea how to fix?

my guess is that the versions are too much different,
try to upgrade your self-hosted to 1.9.x then migrate to cloud
(backup your data before upgrading the self-hosted)
https://appwrite.io/docs/advanced/self-hosting/production/updates

else you can try to make your own script to extract all the data with the 1.5.x syntax
then make another script to import in cloud using the 1.9.x syntax