The Could not retrieve a valid Token response from Token URL: oauth_problem=signature_invalid&oauth_problem_advice=javax.security.auth.login.LoginException%20while%20obtaining%20request%20token%20for%20%3APOST%26https%253A%252F%252Fapi.linkedin.com%252Fuas%252Foauth%252FrequestToken%26oauth_callback%253Dhttp%25253A%25252F%25252Fwww.workretail.co.uk%25252Fsocial%25252F%25253Fnetwork%25253Dlinkedin%252526lResponse%25253D1%2526oauth_consumer_key%253D77fkgy1nao3meg%2526oauth_nonce%253Defd974e5f7b23a8c2f2452037bd641bc%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1590811883%2526oauth_version%253D1.0%2526scope%253Dr_basicprofile%252520r_emailaddress%0AConsumer%20key%20%2077fkgy1nao3meg%20is%20disabled Plugin is set up incorrectly. Please check this issue with the website Administrator.