PHP Laravel pipeline

[Cherin Onyango]

Hi, am new to bitbucket pipelines. Am creating a bitbucket pipeline to deploy Backend Application. But am getting this and I dont seem to understand why.

INFO: Using passed SSH_KEY...Traceback (most recent call last): 
File "/pipe.py", line 108, in <module>    pipe.run() 
File "/pipe.py", line 76, in run   
 self.setup_ssh_config() 
 File "/pipe.py", line 44, in setup_ssh_config   
 f.write(base64.b64decode(ssh_key).decode()) 
 File "/usr/local/lib/python3.8/base64.py", line 87, in b64decode    return binascii.a2b_base64(s)binascii.Error: Invalid base64-encoded string: number of data characters (549) cannot be 1 more than a multiple of 4

My pipeline fails at the deploy part on pipe:

Kindly assist on how to handle this.