When I'm trying to sign up: Error: failed to find request token in session at Strategy.OAuthStrategy.authenticate (/app/node_modules/passport-linkedin/node_mod

When I'm trying to sign up: Error: failed to find request token in session at Strategy.OAuthStrategy.authenticate (/app/node_modules/passport-linkedin/node_modules/passport-oauth/lib/passport-oauth/strategies/oauth.js:124:54) at Strategy.authenticate (/app/node_modules/passport-linkedin/lib/passport-linkedin/strategy.js:118:40) at attempt (/app/node_modules/passport/lib/middleware/authenticate.js:337:16) at authenticate (/app/node_modules/passport/lib/middleware/authenticate.js:338:7) at /app/linkedin.js:84:15 at callbacks (/app/node_modules/express/lib/router/index.js:164:37) at param (/app/node_modules/express/lib/router/index.js:138:11) at pass (/app/node_modules/express/lib/router/index.js:145:5) at nextRoute (/app/node_modules/express/lib/router/index.js:100:7) at callbacks (/app/node_modules/express/lib/router/index.js:167:11)