install.package_json_invalid
package.json (or composer.json) is not valid JSON
A mevcore app hosting error at the “install and build” stage.
What it means
The dependency file cannot be read: a missing comma, a trailing comma, a comment, or merge conflict markers (<<<<<<<).
The error happened while installing dependencies or building the project. The new version was not started, the current one keeps running.
Typical causes
- The install or build command exited with an error
- Out of memory or disk space
- The language or package manager version is not the one the project expects
How to fix it on mevcore
Fix the file at the position from the log line and commit.
- 1 Open the app in the mevcore panel: the Problems card on the overview shows this error and the log line it was found in.
- 2 After the fix, deploy again. If it fails again, the log ends with [mevcore] lines naming the new error code.
- 3 The "Ask AI" button next to the error prepares a request for ChatGPT or Claude: the error code, the end of the log without secrets and the app settings.
For an AI assistant
The same in English: paste it together with the log into the AI chat.
mevcore error code: install.package_json_invalid phase: install and build diagnosis: package.json (or composer.json) is not valid JSON platform hint: The dependency file cannot be read: a missing comma, a trailing comma, a comment, or merge conflict markers (<<<<<<<). Fix the file at the position from the log line and commit. platform docs: https://mevcore.com/llms-full.txt
Related errors
All error codes · How to prepare your project for mevcore · llms-full.txt
Can't fix it?
Message support with the error code: we will tell you what to change in the project or settings.