Error report when angular project runs for the first time

when you run the angular project for the first time every day, you use the AngularCli command, ng serve-- open to start the project, but the first time every day is always unsuccessful. The error shows that Cannot GET/, opens the angular-routing.ts file, does nothing, saves it, goes back to the browser page, and Ctrl+F5 refreshes it. Then close the project and start it again with ng serve-open, and you won"t get it wrong, just for the first time every day. Please take a look at it. I really don"t know what code to attach. I need to see what code is raised in the answer. I will update the question.
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Jun.09,2022

try another browser or reinstall angular

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-7b7a91-29c5f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-7b7a91-29c5f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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