Java side is empty

I got this error when I performed hl.linear_regression_rows or mt_prune.

/usr/lib/jvm/java-1.8.0-openjdk- symbol lookup error: /tmp/ undefined symbol: cblas_dgemm
ERROR:root:Exception while sending command.
Traceback (most recent call last):
File “/home/ps20/anaconda3/envs/gwas/lib/python3.9/site-packages/py4j/”, line 516, in send_command
raise Py4JNetworkError(“Answer from Java side is empty”)
py4j.protocol.Py4JNetworkError: Answer from Java side is empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/home/ps20/anaconda3/envs/gwas/lib/python3.9/site-packages/py4j/”, line 1038, in send_command
response = connection.send_command(command)
File “/home/ps20/anaconda3/envs/gwas/lib/python3.9/site-packages/py4j/”, line 539, in send_command
raise Py4JNetworkError(
py4j.protocol.Py4JNetworkError: Error while sending or receiving

After this error, all code didnot work with ConnectionRefusedError: [Errno 111] Connection refused.

What can I do … T.T…