Hi kemaksmetu,
For further information regarding the error light flashes that you are experiencing, please use the following link:
https://ugp01.c-ij.com/ij/webmanual/Manual/W/MG2900%20series/EN/UG/ug_trouble0300.html
If you are unable to resolve the error, it is recommended that you contact one of Canon's Technical Support Representatives via phone or chat. To contact a Technical Support Representative, please use the link below:
https://mycanon.usa.canon.com