Upon attempting connection Octoprint has 0 candidate printers to search for so it has nothing to find.
I enabled Virtual Printer and it reports 1 candidate printer which it connects to.
When I disable Virtual Printer it has 0 candidates
What happened to my printer spec. It appears to be there under Printer Setup.
This is from turning Virtual Printer on and off:
2021-04-02 02:01:55,156 - octoprint.server.util.flask - INFO - Passively logging in user ghb from ::ffff:192.168.1.227
2021-04-02 02:01:55,157 - octoprint.access.users - INFO - Logged in user: ghb
2021-04-02 02:01:55,196 - octoprint.server.util.sockjs - INFO - User ghb logged in on the socket from client ::ffff:192.168.1.227
2021-04-02 02:02:59,692 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2021-04-02 02:02:59,719 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.1.227
2021-04-02 02:02:59,746 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 0 port/baudrate candidates:
2021-04-02 02:02:59,747 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Error: No more candidates to test, and no working port/baudrate combination detected."
2021-04-02 02:02:59,748 - octoprint.util.comm - INFO - Changing monitoring state from "Error: No more candidates to test, and no working port/baudrate combination detected." to "Offline (Error: No more candidates to test, and no working port/baudrate combination detected.)"
2021-04-02 02:02:59,816 - octoprint.plugins.action_command_notification - INFO - Notifications cleared
2021-04-02 02:03:01,521 - octoprint.plugins.tracking - INFO - Sent tracking event commerror_autodetect, payload: {'commerror_text': 'No more candidates to test, and no working port/baudrate combination detected.', 'throttled_now': False, 'throttled_past': True, 'throttled_mask': 851968}
2021-04-02 02:03:46,705 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.1.227
2021-04-02 02:03:47,517 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.1.227
2021-04-02 02:03:47,662 - octoprint.server.util.flask - INFO - Passively logging in user ghb from ::ffff:192.168.1.227
2021-04-02 02:03:47,663 - octoprint.access.users - INFO - Logged in user: ghb
2021-04-02 02:03:47,848 - octoprint.server.util.sockjs - INFO - User ghb logged in on the socket from client ::ffff:192.168.1.227
2021-04-02 02:04:42,997 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.1.227
2021-04-02 02:04:43,103 - octoprint.server.util.flask - INFO - Passively logging in user ghb from ::ffff:192.168.1.227
2021-04-02 02:04:43,104 - octoprint.access.users - INFO - Logged in user: ghb
2021-04-02 02:04:43,218 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.1.227
2021-04-02 02:04:43,262 - octoprint.server.util.sockjs - INFO - User ghb logged in on the socket from client ::ffff:192.168.1.227
2021-04-02 02:04:43,281 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.1.227
2021-04-02 02:04:43,294 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.1.227
2021-04-02 02:06:33,987 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Detecting serial connection"
2021-04-02 02:06:34,012 - octoprint.util.comm - INFO - Serial detection: Performing autodetection with 1 port/baudrate candidates: VIRTUAL@115200
2021-04-02 02:06:34,012 - octoprint.util.comm - INFO - Serial detection: Trying port VIRTUAL, baudrate 115200
2021-04-02 02:06:34,115 - octoprint.util.comm - INFO - Serial detection: Handshake attempt #1 with timeout 2.0s
2021-04-02 02:06:34,132 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-04-02 02:06:34,169 - octoprint.util.comm - INFO - Changing monitoring state from "Detecting serial connection" to "Operational"
I added a new printer and made it the default. It is also not recognized during Connect.
I tried Safe Mode.