reporting services - The ConnectionString property has not been initialized. SSRS -

an admin account ssrs password changed encryption key had problem , no longer getting encryption error. when try access reports prompted again creds datasource. creds use access report doesn't work datasource. 'an error has occurred during report processing. (rsprocessingaborted) cannot create connection data source 'xxxxx'. (rserroropeningconnection) connectionstring property has not been initialized.

if try delete folder or edit datasource 'could not connec server. please check network settings , tray again later.

the problem chrome , using report manager. creds cache/saved , when in chrome not make changes, deletions or adds. went firefox never used connect report manager , allowed me create new shared datasource , point reports them. after issue gone.