Problem Occurred
Starting MyEclipse Tomcat v8.5' has
encountered a problem.
Server MyEclipse Tomcat v8.5 was unable to
start within 45 seconds. If the server requires
more time, try increasing the timeout in the
server editor.
OK
Details
这个能解决你的问题，如有帮助请采纳。
https://blog.csdn.net/Luyanc/article/details/80726148
应该是你项目启动超过45秒，超时了。你可以设置下tomcat启动超时时间