After Upgrade to GitOps v1.14 Applications are failing with repository connectivity issues

Issue

• After Upgrade to GitOps v1.14, the Application/ApplicationSet are failing with repository connectivity issues:

• On ArgoCD Dashboard Application page we getting errors like:

  Unable to load data: error acquiring repo lock: failed to initialize repository resources: rpc error: code = Internal desc = Failed to fetch default: `git fetch origin --tags --force --prune` failed exit status 128: Could not create directory '/.ssh'. Host key verification failed. fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.
  
  # OR
  
  Failed to load target state: failed to generate manifest for source 1 of 1: rpc error: code = Unknown desc = failed to initialize repository resources: rpc error: code = Internal desc = Failed to fetch default: `git fetch origin --tags --force --prune` failed exit status 128: Could not create directory '/.ssh'.
  
  # OR
  
  Unable to load data: error acquiring repo lock: failed to initialize repository resources: rpc error: code = Internal desc = Failed to fetch default: `git fetch origin --tags --force --prune` failed exit status 128: fatal: could not read Username for '<url>': terminal prompts disabled
  
  # OR
  
  error generating params from git: error retrieving Git files: rpc error: code = Internal desc = unable to resolve git revision: Get "<url>": tls: failed to verify certificate x509: certificate signed by unknown authority
  

• In repo-server pod logs we are getting errors like:

  Failed to add the ECDSA host key for IP address '<ip>' to the list of known hosts (/.ssh/known_hosts).
  <url>: Permission denied (publickey).
  fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.
  

• Applications stuck in Unknown State:

  NAME                SYNC STATUS   HEALTH STATUS   REVISION    PROJECT
  <Application-Name>  Unknown       Healthy                     <AppProject-Name>