diff --git a/docs/Troubleshooting/Installation.md b/docs/Troubleshooting/Installation.md
index eb176fc18b0..bc2422a6f69 100644
--- a/docs/Troubleshooting/Installation.md
+++ b/docs/Troubleshooting/Installation.md
@@ -10,6 +10,11 @@ description: >
 The cause is the `devlake` container trying to decrypt data in the database with the wrong key.
 Please check the [GettingStarted/Upgrade](../GettingStarted/Upgrade.md) doc for more detail.
 
+### `process was terminated unexpectedly` error
+
+when collect datas, the task was failed.  The cause is the `devlake` container  and `grafana` container 's volumes not have the permissions to write.  it need to change the permissions of the volumes mounting directory of a and b to 777 
+
+
 ## None of them solve your problem?
 
 Sorry for the inconvenience, please help us improve by [creating an issue](https://github.com/apache/incubator-devlake/issues)