As you can check below screenshot I tried to make PUT api call in the Contentful to update the entry.
When I try to hit GET call, everything works fine but don't understand here what is reason of this below error while making PUT call.
Did I missed anything here or anything wrong here?
NOTE: I changed all the variable while making call, spaceId, env, entryId and authorisation(passing access_token)

From what I see in your URL, it looks like you are trying to hit the
Contentful Preview API, which is read-only.source
Therefore, updating an entry via a
PUTrequest cannot be done with the url you are using.However, I believe your
PUTrequest should work if you update the base url to behttps://api.contentful.com/instead. This is the endpoint for theContent Management API.Important note:
Content Management API.Using
https://api.contentful.com/hits the writableContent Management API, which has documentation for thePUTrequest you are making.Importing the corresponding
curlcommand into your Postman client will confirm this.So in the end, the url would be this:
https://api.contentful.com/spaces/{space_id}/environments/{environment_id}/entries/{entry_id}
Again, the bearer token will have to come from the writable Content Management API.