ch.qos.logback.classic.Logger Error after upgrading External Hooks plugin

[Bibin Varghese]

I'm on bitbucket server 7.17.10 LTS. Recently I've upgraded the plugin external hooks by reconquest and I've started receiving error whenever I try to load the external-hooks/diagnostics page. I've checked the logs and it shows

"ERROR [http-nio-7990-exec-10] o.a.c.c.C.[.[.[/].[plugins] Servlet.service() for servlet [plugins] in context with path [] threw exception
java.lang.ClassCastException: ch.qos.logback.classic.Logger cannot be cast to ch.qos.logback.classic.Logger"

Please let me know your thoughts on this.