Below is the copy of the log right where the errors start.
18:36:51.028: N18 M532 X100.0000 L0
18:36:51.031: N19 M539 P0
18:36:51.031: ok 18
18:36:51.031: N20 M532 X0 L0
18:36:51.031: N21 M531 focus-ring
18:36:51.039: Error:Checksum required when switching back to ASCII protocol.
18:36:51.039: Resend:19
18:36:51.050: ok
18:36:51.050: Resend: N19 M539 P0
18:36:51.050: Resend: N20 M532 X0 L0
18:36:51.051: Resend: N21 M531 focus-ring
18:36:51.054: ok 19
18:36:51.055: N22 M530 S1 L43
18:36:51.163: T:26.30 /0 B:30.43 /0 B@:0 @:0 T0:26.30 /0 @0:0 T1:32.31 /0 @1:0 T2:25.28 /0 @2:0 T3:25.28 /0 @3:0
18:36:51.164: ok 20
18:36:51.164: ok 21
18:36:51.164: Error:Wrong checksum
18:36:51.164: Resend:22
18:36:51.175: ok
18:36:51.175: Resend: N22 M530 S1 L43
18:36:51.175: N23 G90
18:36:51.175: N24 M82
18:36:51.176: N25 M106 S0
18:36:51.176: N26 M140 S55
18:36:51.182: Error:Checksum required when switching back to ASCII protocol.
18:36:51.182: Resend:22
18:36:51.191: ok
18:36:51.191: N27 M190 S55
18:36:51.191: N28 M104 S225 T0
18:36:51.191: N29 M109 S225 T0
18:36:51.192: N30 M602 S1 P0
18:36:51.192: N31 G21; set mm units
18:36:51.399: Resend:22
18:36:51.407: ok
18:36:51.408: N32 M117 ETA 19:09:16 day 11
18:36:51.408: N33 G28 ; home all axes
18:36:51.408: N34 G90; set absolute coordinates
18:36:51.408: N35 G92 E0; reset extruder distance
18:36:51.615: Resend:22
18:36:51.624: ok
18:36:51.624: N36 G92 E0
18:36:51.624: N37 G1 E-4.0000 F1800
18:36:51.624: N38 G1 Z0.450 F1500
18:36:51.624: N39 T0
18:36:51.833: Resend:22
18:36:51.841: ok
18:36:51.842: N40 G1 X45.771 Y78.790 F7500
18:36:51.842: N41 G1 E0.0000 F540
18:36:51.842: N42 G92 E0
18:36:52.050: Resend:22
18:36:52.058: ok
18:36:52.058: N43 G1 X45.812 Y78.766 E0.0057 F1440
18:36:52.058: N44 M532 X0.0848 L1
18:36:52.059: N45 G1 X46.681 Y78.345 E0.1225
18:36:52.216: T:26.39 /0 B:30.43 /0 B@:0 @:0 T0:26.39 /0 @0:0 T1:32.22 /0 @1:0 T2:25.37 /0 @2:0 T3:25.28 /0 @3:0
18:36:52.267: Resend:22
18:36:52.267: Resend after 1102ms
18:36:52.277: ok
18:36:52.278: Resend: N22 M530 S1 L43
18:36:52.278: Resend: N23 G90
18:36:52.278: Resend: N24 M82
18:36:52.279: Resend: N25 M106 S0
18:36:52.279: Resend: N26 M140 S55
18:36:52.284: ok 22
18:36:52.284: Resend: N27 M190 S55
18:36:52.284: Resend: N28 M104 S225 T0
18:36:52.387: ok 23
18:36:52.391: Error:Checksum required when switching back to ASCII protocol.
18:36:52.391: Resend:24
18:36:52.401: ok
18:36:52.401: Resend: N24 M82
18:36:52.401: Resend: N25 M106 S0
18:36:52.401: Resend: N26 M140 S55
18:36:52.401: Resend: N27 M190 S55
18:36:52.401: Resend: N28 M104 S225 T0
18:36:52.407: Error:Wrong checksum
18:36:52.407: Resend:24
18:36:52.415: ok
18:36:52.415: Resend: N29 M109 S225 T0
18:36:52.415: Resend: N30 M602 S1 P0
18:36:52.415: Resend: N31 G21; set mm units
18:36:52.623: Resend:24
18:36:52.632: ok
18:36:52.632: Resend: N32 M117 ETA 19:09:16 day 11
18:36:52.632: Resend: N33 G28 ; home all axes
18:36:52.632: Resend: N34 G90; set absolute coordinates
18:36:52.632: Resend: N35 G92 E0; reset extruder distance
18:36:52.840: Resend:24
18:36:52.848: ok
18:36:52.848: Resend: N36 G92 E0
18:36:52.848: Resend: N37 G1 E-4.0000 F1800
18:36:52.848: Resend: N38 G1 Z0.450 F1500
18:36:52.848: Resend: N39 T0
18:36:53.058: Resend:24
18:36:53.066: ok
18:36:53.066: Resend: N40 G1 X45.771 Y78.790 F7500
18:36:53.066: Resend: N41 G1 E0.0000 F540
18:36:53.066: Resend: N42 G92 E0
18:36:53.223: T:26.30 /0 B:30.43 /0 B@:0 @:0 T0:26.30 /0 @0:0 T1:32.22 /0 @1:0 T2:25.28 /0 @2:0 T3:25.37 /0 @3:0
18:36:53.275: Resend:24
18:36:53.283: ok
18:36:53.283: Resend: N43 G1 X45.812 Y78.766 E0.0057 F1440
18:36:53.284: Resend: N44 M532 X0.0848 L1
18:36:53.284: Resend: N45 G1 X46.681 Y78.345 E0.1225
18:36:53.492: Resend:24
18:36:53.500: ok
18:36:53.501: N46 G1 X46.724 Y78.327 E0.1282
18:36:53.501: N47 G1 X47.825 Y77.961 E0.2686
18:36:53.501: N48 G1 X47.871 Y77.949 E0.2743