Compilation error due to an update?

Hey,
Will appreciate any help with the following compilation error;

Error detected in "generate_events run_01"
write debug file /home/yael/MG5_aMC_v2_3_3/lumi/run_01_tag_1_debug.log
If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
MadGraph5Error : A compilation Error occurs when trying to compile /home/yael/MG5_aMC_v2_3_3/lumi/Source.
 The compilation fails with the following output message:
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -c -o setrun.o setrun.f
     ar cru ../lib/libgeneric.a alfas_functions.o transpole.o invarients.o hfill.o pawgraphs.o ran1.o rw_events.o rw_routines.o kin_functions.o open_file.o basecode.o setrun.o run_printout.o dgauss.o readgrid.o getissud.o
     ranlib ../lib/libgeneric.a
     cd PDF; make
     make[1]: Entering directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/PDF'
     ar cru ../../lib/libpdf.a Ctq4Fn.o Ctq5Par.o Ctq5Pdf.o Partonx5.o Ctq6Pdf.o cteq3.o mrs98.o mrs98lo.o mrs98ht.o mrs99.o mrst2001.o mrst2002.o jeppe02.o pdfwrap.o opendata.o pdf.o PhotonFlux.o pdg2pdf.o NNPDFDriver.o
     ranlib ../../lib/libpdf.a
     make[1]: Leaving directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/PDF'
     cd MODEL; make
     make[1]: Entering directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/MODEL'
     gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -c -o rw_para.o rw_para.f
     ar cru ../../lib/libmodel.a couplings.o lha_read.o printout.o rw_para.o model_functions.o couplings1.o couplings2.o
     ranlib ../../lib/libmodel.a
     make[1]: Leaving directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/MODEL'
     cd BIAS/dummy; make
     make[1]: Entering directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/BIAS/dummy'
     ar cru dummy.o
     ar: dummy.o: File format not recognized
     make[1]: *** [dummy] Error 1
     make[1]: Leaving directory `/home/yael/MG5_aMC_v2_3_3/lumi/Source/BIAS/dummy'
     make: *** [../lib/libbias.a] Error 2

 Please try to fix this compilations issue and retry.
 Help might be found at https://answers.launchpad.net/mg5amcnlo.
 If you think that this is a bug, you can report this at https://bugs.launchpad.net/mg5amcnlo

It suddenly appears whenever I try to launch any process in MG5.
Automatic updating is the only thing I can think of as the cause of it, as it's the only thing that happened since the time it worked without errors.

Thank you so much in advance,
Yael