The TFE provider versions 0.65.0, and 0.65.1 have been found to contain a regression. Some have already been fixed, or reverted, by a new provider release. If you use these versions of the provider, and see problems, the solution is to pin down the version to 0.64.0 using the following code[1]:
terraform {
  required_providers {
    tfe = {
      source  = "hashicorp/tfe"
      version = "0.64.0"
    }
}
- 
tfe_policy_set_parameter resource fails with an error about the schema version. Schema is a definition of how a resource is saved in the state:
Error: error marshaling prior state: schema version 0 for tfe_policy_set_parameter.policy_set_parameter in state does not match version 1 from the provider - 
tfe_notification_configuration resource might fail when validating the url argument:
The attribute 'url' is required when 'destination_type' is '<type>'
 - 
tfe_outputs data source might cause a go panic.
 - 
team_token resource will erroneously remove the value from the state:
# tfe_team_token.this[0] has changed ~ resource "tfe_team_token" "team_tokens" { id = "team-1234567890abcdef" - token = (sensitive value) -> null # (1 unchanged attribute hidden) } 
As soon as new version addressing these will be available, you can continue to update your provider version as usual.