OAuth client error

Error: it was not possible to access the OAuth request token: it was returned an unexpected response status 401 Response: oauth_problem=signature_invalid&oauth_problem_advice=javax.security.auth.login.LoginException%20while%20obtaining%20request%20token%20for%20%3AGET%26https%253A%252F%252Fapi.linkedin.com%252Fuas%252Foauth%252FrequestToken%26oauth_callback%253Dhttp%25253A%25252F%25252Fmatchmkr.co.uk%25252Fconnect-linkedin.php%2526oauth_consumer_key%253D77w3wsx1dyfij2%2526oauth_nonce%253D3b86b9e54d3203d94edfe7e722b2c3ea%2526oauth_signature_method%253DHMAC-SHA1%2526oauth_timestamp%253D1582268365%2526oauth_version%253D1.0%2526scope%253Dr_basicprofile%252520r_emailaddress%0AConsumer%20key%20%2077w3wsx1dyfij2%20is%20disabled