我已经按照网站上的电子材料文档接受了比特币，最后，当我尝试使用给定命令“电子材料添加请求3.14 -m“这是测试””添加请求时，它引发了这个错误
File "/usr/local/bin/electrum", line 426, in <module>
result = run_offline_command(config, config_options, plugins)
File "/usr/local/bin/electrum", line 259, in run_offline_command
result = func(*args, **kwargs)
File "/root/.local/lib/python3.6/site-packages/electrum/commands.py", line 96, in func_wrapper
return func(*args, **kwargs)
File "/root/.local/lib/python3.6/site-packages/electrum/commands.py", line 668, in addrequest
self.wallet.add_payment_request(req, self.config)
File "/root/.local/lib/python3.6/site-packages/electrum/wallet.py", line 1272, in add_payment_request
pr = paymentrequest.make_request(config, req)
File "/root/.local/lib/python3.6/site-packages/electrum/paymentrequest.py", line 479, in make_request
sign_request_with_x509(pr, key_path, cert_path)
File "/root/.local/lib/python3.6/site-packages/electrum/paymentrequest.py", line 448, in sign_request_with_x509
params = pem.parse_private_key(f.read())
File "/root/.local/lib/python3.6/site-packages/electrum/pem.py", line 141, in parse_private_key
bytes = dePem(s, "PRIVATE KEY")
File "/root/.local/lib/python3.6/site-packages/electrum/pem.py", line 71, in dePem
retBytes = a2b_base64(s) # May raise SyntaxError
File "/root/.local/lib/python3.6/site-packages/electrum/pem.py", line 40, in a2b_base64
raise SyntaxError("base64 error: %s" % e)
SyntaxError: base64 error: Incorrect padding