Problem with launching ThingWorx Platform

[RubanZ]

After logging in, it redirects to /Thingworx/Composer/index.html and a subsequent 404 error. Below is the error from "ApplicationLog.log". How can I solve this problem?

2018-04-23 11:15:34.279+0500 [L: WARN] [O: c.t.s.a.AuthenticationFilter] [I: ] [U: ] [S: ] [T: http-nio-80-exec-5] The REST API was accessed using an appKey url parameter with an invalid keyId.
2018-04-23 11:19:58.633+0500 [L: ERROR] [O: c.t.w.BaseService] [I: ] [U: Administrator] [S: ] [T: http-nio-80-exec-7] [context: com.thingworx.webservices.context.HttpExecutionContext@53fb3971][message: Start is not supported on this Subsystem!]

[visla]

Hello!

Could you please provide the following information for a better understanding of the issue?

- ZIP with ThingWorx logfiles under /ThingworxStorage/logs containing the information from when the 404 error occurred

- Apache logfiles also from when the 404 error occurred

- Which ThingWorx version are you using?

- Which Apache version are you using?

- Which Operating System?

- Is this issue occurring after a fresh install or was ThingWorx working before and it stopped working now?

- When you mention "after logging in", what are you actually doing? Are you just launching the ThingWorx Composer or are you running any command?

Thank you!

Best Regards,

Vanessa