[Snapshot Pro] Snapshot Log Errors

Hi,

The log keeps on building up with errors and I do not know what it means. There are back ups available so why are there errors and what do they mean?

[snapshot][2018-04-01 01:01:17][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:19][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:22][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:26][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:30][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:32][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:36][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:40][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:43][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:46][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:51][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:56][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:01:59][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:04][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:09][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:21][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:26][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:31][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:37][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:43][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:46][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:48][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:50][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:53][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:55][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:02:57][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:00][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:02][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:04][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:06][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:08][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:10][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:13][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:16][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:18][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:20][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:22][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:25][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:27][Warning] Unable to perform requested system backup, proceeding with builtin
[snapshot][2018-04-01 01:03:30][Warning] Unable to perform requested system backup, proceeding with builtin